#include<fstream>
using namespace std;
const int cutoff=6000;
const float rate1=0.3;
const float rate2=0.6;
int main(){
	ifstream infile;
	ofstream outfile;
	int income,tax;
	infile.open("income.in");
	outfile.open("tax.out");
	while(infile>>income){
		if(income<cutoff)
			tax=rate1*income;
		else
			tax=rate2*income;
		outfile<<"income="<<income<<"greenbacks"<<endl
		       <<"tax="<<tax<<"greenbacks"<<endl;
		}
		infile.close();
		outfile.close();
		return 0;
	
	}